The bug in question was fixed by an alternate version of the FBReader that has since spawned an ongoing project. Try testing this one:
https://www.mobileread.com/forums/showthread.php?t=65865
It is up to version 0.9.0:
http://fbreader-pockebook.googlecode...-app-0.9.0.zip
It is the most commonly used reader app for DRM-free content on Pocketbook readers.